koo
To be kool.
That du rag be koo dawg.
by Wangsta November 18, 2003
koo
The act of which the primary aim is to gain, regain or sustain social status, by partaking in an action that the individual perceives to be "cool".
Person A embarrasses Person B in front of Girl C that Person B is trying to impress/pull/shag etc.

(Hence being koo!)

Person B would then have licence to say: "Very Koo!"
by Sensini October 21, 2005
the middle eastern word for pussy.not to be mistaken for cous cous. it is a rather vulgar way to describe the vagina.
lad: yo bitch, blow me
chick: naaah kid not before you kiss my koos
by Bad Man Clint June 22, 2007
koo
a person who is a total genius. These people have GPAs of 5.1. Even though there is a lack of koo-i-ness in people, they totally own any other random last names. Comes with a huge abnormally large head. Common sense not included.
Wow did you see how that smart guy walked into a wall and then crushed it with his abnormally large head, must be a koo.
by Pandapwnsyou December 23, 2010
A Finnish version of foo or LOL, a default answer when someone pastes URL, but it's not enough for 'lolling'. Also something that is said when joining the channel or just at a random time as in the example below. Correct answer to köö is ... köö.
Köö can be also used as a part of a word, such as "öököö", meaning OK.
Captain Kirk's name is also sometimes spelt "Köök".
In fact, köö can mean anything.

Someone with handle "Kissa" invented the word 'köö' and it was first used in the IRC-channel #comrades in Quakenet, from where it started to slowly spread around. #comrades is still the main place of 'köökötys' (=kööking)
19:46:50 <@Kissa-> köö
19:46:59 <+Shilka> köö
by ultrix November 15, 2003
koo
A complete bender who is afraid of getting in trouble.
Oliver- I'm gonna kill you *sees teacher* ohhhhh nooooooooo dave- your such a koo
by uberfan1 November 24, 2011
Koo
Originally the result of a mancunian attempting to mimic a seagull, the word 'Koo' is best used when stoned to warn others around you that you are in said condition. It can also be used as a substitute to just about any other word in the english language, though such usage is ill-advised as it can irrevocably damage your social life and lose you some serious pulling opportunities.
1:Basil: "Kooooooooooo im fuckin well stoned"
Trevor "Koooooooo me tooooo"

2:Gary: "Are you kooing then you koo-faced koo-dodger for koo's sake?"

Ahmed: "Koo off"
by Nathaniel Bones October 05, 2006

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